The background synchronization API registers a service worker callback to run only when the device is no longer offline. You can use this to let users continue using your app while offline and synchronize with a server after reconnecting.

Compatibility

• Chrome 49 Released on 2016-03-02
• Chrome Android 49 Released on 2016-03-09
• Edge 79 Released on 2020-01-15
• Firefox ❌ Search for bugs Search for standards position
• Firefox for Android ❌ Search for bugs Search for standards position
• Safari ❌ Search for bugs Search for standards position
• Safari on iOS ❌ Search for bugs Search for standards position

BCD data

• api.ServiceWorkerGlobalScope.sync_event
• api.ServiceWorkerRegistration.sync
• api.SyncEvent
• api.SyncEvent.SyncEvent
• api.SyncEvent.lastChance
• api.SyncEvent.tag
• api.SyncManager
• api.SyncManager.getTags
• api.SyncManager.register